The Citadelle is an active military garrison and a National Historic Site, located atop Cap Diamant. Its walls enclose 300 years of military history spanning the French, British and Canadian periods. Guided tours of the Citadelle and access to the Musée Royal 22e Régiment's exhibits are available year-round. Its permanent exhibition "Je me souviens" presents the 100-year-long history of the Royal 22e Regiment, the Canadian Forces' sole French-language regular force infantry regiment. Visitors will also enjoy a special exhibition every year. Military ceremonies of the Changing of the Guard (from June 24 to 1st Monday of September) and Beating of the Retreat (July and August), are included in the entrance fee. Night tours in summer and fall.